drivers/target/target_core_xcopy.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #include <target/target_core_base.h>
   3
   4 #define XCOPY_HDR_LEN                   16
   5 #define XCOPY_TARGET_DESC_LEN           32
   6 #define XCOPY_SEGMENT_DESC_LEN          28
   7 #define XCOPY_NAA_IEEE_REGEX_LEN        16
   8 #define XCOPY_MAX_BYTES                 16777216 /* 16 MB */
   9
  10 /*
  11  * SPC4r37 6.4.6.1
  12  * Table 150 — CSCD descriptor ID values
  13  */
  14 #define XCOPY_CSCD_DESC_ID_LIST_OFF_MAX 0x07FF
  15
  16 enum xcopy_origin_list {
  17         XCOL_SOURCE_RECV_OP = 0x01,
  18         XCOL_DEST_RECV_OP = 0x02,
  19 };
  20
  21 struct xcopy_op {
  22         int op_origin;
  23
  24         struct se_cmd *xop_se_cmd;
  25         struct se_device *src_dev;
  26         unsigned char src_tid_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
  27         struct se_device *dst_dev;
  28         unsigned char dst_tid_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
  29         unsigned char local_dev_wwn[XCOPY_NAA_IEEE_REGEX_LEN];
  30         struct percpu_ref *remote_lun_ref;
  31
  32         sector_t src_lba;
  33         sector_t dst_lba;
  34         unsigned short stdi;
  35         unsigned short dtdi;
  36         unsigned short nolb;
  37
  38         u32 xop_data_bytes;
  39         u32 xop_data_nents;
  40         struct scatterlist *xop_data_sg;
  41         struct work_struct xop_work;
  42 };
  43
  44 /*
  45  * Receive Copy Results Sevice Actions
  46  */
  47 #define RCR_SA_COPY_STATUS              0x00
  48 #define RCR_SA_RECEIVE_DATA             0x01
  49 #define RCR_SA_OPERATING_PARAMETERS     0x03
  50 #define RCR_SA_FAILED_SEGMENT_DETAILS   0x04
  51
  52 /*
  53  * Receive Copy Results defs for Operating Parameters
  54  */
  55 #define RCR_OP_MAX_TARGET_DESC_COUNT    0x2
  56 #define RCR_OP_MAX_SG_DESC_COUNT        0x1
  57 #define RCR_OP_MAX_DESC_LIST_LEN        1024
  58 #define RCR_OP_MAX_SEGMENT_LEN          268435456 /* 256 MB */
  59 #define RCR_OP_TOTAL_CONCURR_COPIES     0x1 /* Must be <= 16384 */
  60 #define RCR_OP_MAX_CONCURR_COPIES       0x1 /* Must be <= 255 */
  61 #define RCR_OP_DATA_SEG_GRAN_LOG2       9 /* 512 bytes in log 2 */
  62 #define RCR_OP_INLINE_DATA_GRAN_LOG2    9 /* 512 bytes in log 2 */
  63 #define RCR_OP_HELD_DATA_GRAN_LOG2      9 /* 512 bytes in log 2 */
  64
  65 extern int target_xcopy_setup_pt(void);
  66 extern void target_xcopy_release_pt(void);
  67 extern sense_reason_t target_do_xcopy(struct se_cmd *);
  68 extern sense_reason_t target_do_receive_copy_results(struct se_cmd *);